Global Patent Index - EP 1335552 A1

EP 1335552 A1 20030813 - Estimation of channel response and of delay in multicarrier systems

Title (en)

Estimation of channel response and of delay in multicarrier systems

Title (de)

Kanal- und Verzögerungsschätzung in Mehrträgersystemen

Title (fr)

Estimation de canal et de retard dans des systèmes à porteuses multiples

Publication

EP 1335552 A1 20030813 (EN)

Application

EP 02250843 A 20020207

Priority

EP 02250843 A 20020207

Abstract (en)

In an OFDM receiver the complex values of predetermined pilot sub-carriers are compared with expected values to determine pilot distortion values for those sub-carriers. The phases of the differences between successive values are determined, and then the rate at which these phases change with respect to sub-carrier frequency is determined. Data distortion estimates for other sub-carriers can be calculated by interpolation of the pilot distortion values such that the data distortion estimates have a phase which substantially complies with the determined rate. <IMAGE>

IPC 1-7

H04L 27/26; H04L 25/02

IPC 8 full level

H04J 11/00 (2006.01); H04B 7/01 (2006.01); H04L 25/02 (2006.01); H04L 27/26 (2006.01)

CPC (source: EP US)

H04L 25/0234 (2013.01 - EP US); H04L 27/2647 (2013.01 - EP US)

Citation (search report)

  • [A] WO 0156239 A2 20010802 - ZION HADAD COMM LTD [IL], et al
  • [A] US 2001015954 A1 20010823 - KUWABARA MASAHIRO [JP], et al
  • [A] EP 1047232 A2 20001025 - LUCENT TECHNOLOGIES INC [US]
  • [A] FAZEL: "Narrow-band interference rejection in orthogonal multi-carrier spread-spectrum communications", INTERNATIONAL CONFERENCE ON UNIVERSAL PERSONAL COMMUNICATIONS, 27 September 1994 (1994-09-27) - 1 October 1994 (1994-10-01), New York, US, pages 46 - 50, XP010131551

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

EP 1335552 A1 20030813; EP 1335552 B1 20070110; DE 60217464 D1 20070222; DE 60217464 T2 20071115; JP 2003264529 A 20030919; JP 4293798 B2 20090708; US 2003169682 A1 20030911; US 7286466 B2 20071023

DOCDB simple family (application)

EP 02250843 A 20020207; DE 60217464 T 20020207; JP 2003027495 A 20030204; US 35392803 A 20030130